package com.hxz.lesson05.utils;

import com.hxz.lesson02.utils.JdbcUtils;
import org.apache.commons.dbcp.BasicDataSource;
import org.apache.commons.dbcp.BasicDataSourceFactory;

import javax.sql.DataSource;
import java.io.IOException;
import java.io.InputStream;
import java.sql.*;
import java.util.Properties;

public class JdbcUtils_DBCP {
    private static DataSource dataSource = null;
    static {

        try{
            InputStream in = JdbcUtils.class.getClassLoader().getResourceAsStream("dbcpconfig.properties");
            Properties properties = new Properties();
            properties.load(in);

            // 创建数据源   工厂模式-->创建对象
            dataSource = BasicDataSourceFactory.createDataSource(properties);


        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    //获取连接
    public static Connection getConnection() throws SQLException {
        return dataSource.getConnection(); // 从数据源中获取连接
    }

    //释放资源
    public static void release(Connection conn, Statement st, ResultSet rs) {
        if (rs!=null){
            try {
                rs.close();
            } catch (SQLException throwables) {
                throwables.printStackTrace();
            }
        }
        if (st!=null){
            try {
                st.close();
            } catch (SQLException throwables) {
                throwables.printStackTrace();
            }
        }
        if (conn!=null){
            try {
                conn.close();
            } catch (SQLException throwables) {
                throwables.printStackTrace();
            }
        }


    }
}
